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Which information is needed to construct a geomagnetic time scale? Select the two correct answers.(1 point)

Responses

the average speed of tectonic plates on Earth
the average speed of tectonic plates on Earth

the age of rocks along the surface of Earth
the age of rocks along the surface of Earth

the magnetic direction of rocks along the surface of Earth
the magnetic direction of rocks along the surface of Earth

the length of the mid-oceanic ridge

1 answer

To construct a geomagnetic time scale, the two correct answers are:

  1. the age of rocks along the surface of Earth
  2. the magnetic direction of rocks along the surface of Earth

These two pieces of information are essential for understanding the history of Earth's magnetic field and its variations over geological time.